$20^2+2\left(80\right)+4^2$
$-9+4-4$
$\sqrt{3x^2+6}$
$\left(3x^5y^4\right)^3$
$\frac{x^{12}-9x^6+20}{x^6-2}$
$3x+1+x+x+2x$
$\int4t^2e^{2t}dt$
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